Benefit Plans - Components of Net Periodic Pension (Benefit) Cost (Detail) - USD ($) $ in Thousands	12 Months Ended
	Nov. 30, 2017	Nov. 30, 2016	Nov. 30, 2015
U.S. Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 450	$ 400	$ 250
Interest cost on projected benefit obligation	2,232	2,311	2,340
Expected return on plan assets	(3,021)	(2,917)	(3,357)
Net amortization	19	0	0
Settlement losses	0	0	244
Net periodic pension income	(320)	(206)	(523)
German Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Interest cost on projected benefit obligation	426	529	523
Net amortization	353	326	325
Net periodic pension income	$ 779	$ 855	$ 848